Dear customer, Thank you for choosing our products. If there is any problem with our products, please contact us through the order information. We will be happy to serve you and solve it for you as soon as possible within 12 hours, thank you! NON-TOXIC AND CHILD SAFE Compared to ABS, PLAFilament is non-toxic and safer for children. No bad smell. 1.75 MM filament Universally compatible with most 1.75 mm 3D pens and printers (dimensional accuracy +/- 0.05 mm). Make sure your 3D pen or printer can use PLA filament refills 1.75mm in diameter. Super smooth The filament of the 3D printing pen is made of high-quality material that is always round and does not have any oily residue or cracks. It can produce bright lines and colors without bubbles. 12 COLORS 12 PLA filaments in random colors to scribble your 3D artistic masterpiece idea. A great gift set for your children and art lovers to have fun doing handicrafts and drawing, such as birthday or Christmas, for DIY, arts & crafts, school and creative projects that are fun. Specifications: Material: PLA 3D filament (polylactic acid) Diameter: 1.75 mm Diameter tolerance: + / 0.05 mm Printing temperature: 160 C180 C Quantity: 5 meters / color x 12 colors (random colors) Tips: Make sure your 3D pen or printer can use 1.75mm diameter PLA filament refills.